在操作系统安全内核的实现方式上,一种主流的做法是直接改造原有系统的实现代码,加入安全机制。其中较为常见的是以 LINUX 开放源代码为基础进行开发,直接对内核进行修改。在发现这种做法优点的同时,我们也必须意识到它也存在一定的缺点...在操作系统安全内核的实现方式上,一种主流的做法是直接改造原有系统的实现代码,加入安全机制。其中较为常见的是以 LINUX 开放源代码为基础进行开发,直接对内核进行修改。在发现这种做法优点的同时,我们也必须意识到它也存在一定的缺点,比如兼容性和移植性的问题。本文提出了安全虚拟机(SVM)这一概念,阐述了从系统调用层对操作系统安全实施增强的技术,并根据此策略设计了一个能够达到 C2级安全保护的模型,重点突出了设计思想和实现考虑。展开更多
[Objective] This study was tween yield-related traits and yield of conducted to understand the relationship be- Yunmai 52 which is a high-quality high-yield multi-resistant new wheat variety, and make contribution of ...[Objective] This study was tween yield-related traits and yield of conducted to understand the relationship be- Yunmai 52 which is a high-quality high-yield multi-resistant new wheat variety, and make contribution of yield-related traits to the yield of Yunmai 52 clear. [Method] Wheat variety regional trial data in Yunnan Province in 2005-2007 were subjected to correlation analysis and path analysis in the paper. [Result] Correlationanalysis showed that the yield of Yunmai 52 was in- very significant positive correlation with spikelet number per ear, maximum tiller number and grains per ear （r=0.726^＊＊, 0.717^＊＊ and 0.695^＊＊, respectively）, in signif- icant positive correlation with 1 000-grain weight （r=0.491^＊）, but in significant nega- tive correlation with sterile spikelet number per ear, and in non-significant correlation with basic seedlings, effective ears and percentage of ear bearing tillers. Partial correlation analysis showed that the yield of Yunmai 52 was in very significant posi- tive correlation with spikelet number per ear （r=0.711^＊＊）, significant positive correla- tion with 1 000-grain weight （r=0.641 =）, but in non-significant correlation with other 6 traits. Path analysis showed that spikelet number per ear （P=-0.595）, maximum tiller number （P=0.462） and t 000-grain weight （P=0.263） had more contribution to yield of Yunmai 52. [Conclusion] Therefore, in extension and application of Yunmal 52 that is a high-quality high-yield multi-resistant new wheat variety, supply of fertilizer and water should be increased in tillering stage and jointing stage, to ensure its characteristics of high tilledng ability and large ear, as well as high 1 000-grain weight, and coordinated development of other yield-related traits is beneficial to im- provement of yield of Yunmai 52.展开更多
文摘在操作系统安全内核的实现方式上,一种主流的做法是直接改造原有系统的实现代码,加入安全机制。其中较为常见的是以 LINUX 开放源代码为基础进行开发,直接对内核进行修改。在发现这种做法优点的同时,我们也必须意识到它也存在一定的缺点,比如兼容性和移植性的问题。本文提出了安全虚拟机(SVM)这一概念,阐述了从系统调用层对操作系统安全实施增强的技术,并根据此策略设计了一个能够达到 C2级安全保护的模型,重点突出了设计思想和实现考虑。
基金Supported by National key R&D Projects(2016YFD0101603)National Planning Project Co-supported by Yunnan Province(2014GA016)Science&Technology Specific Project for Benefiting People in China(2014RA056)~~
文摘[Objective] This study was tween yield-related traits and yield of conducted to understand the relationship be- Yunmai 52 which is a high-quality high-yield multi-resistant new wheat variety, and make contribution of yield-related traits to the yield of Yunmai 52 clear. [Method] Wheat variety regional trial data in Yunnan Province in 2005-2007 were subjected to correlation analysis and path analysis in the paper. [Result] Correlationanalysis showed that the yield of Yunmai 52 was in- very significant positive correlation with spikelet number per ear, maximum tiller number and grains per ear （r=0.726^＊＊, 0.717^＊＊ and 0.695^＊＊, respectively）, in signif- icant positive correlation with 1 000-grain weight （r=0.491^＊）, but in significant nega- tive correlation with sterile spikelet number per ear, and in non-significant correlation with basic seedlings, effective ears and percentage of ear bearing tillers. Partial correlation analysis showed that the yield of Yunmai 52 was in very significant posi- tive correlation with spikelet number per ear （r=0.711^＊＊）, significant positive correla- tion with 1 000-grain weight （r=0.641 =）, but in non-significant correlation with other 6 traits. Path analysis showed that spikelet number per ear （P=-0.595）, maximum tiller number （P=0.462） and t 000-grain weight （P=0.263） had more contribution to yield of Yunmai 52. [Conclusion] Therefore, in extension and application of Yunmal 52 that is a high-quality high-yield multi-resistant new wheat variety, supply of fertilizer and water should be increased in tillering stage and jointing stage, to ensure its characteristics of high tilledng ability and large ear, as well as high 1 000-grain weight, and coordinated development of other yield-related traits is beneficial to im- provement of yield of Yunmai 52.
